Home / 30,831.78-42,553.62-18,090.66

Finding the Fourth Proportional to 30,831.78, 42,553.62 and 18,090.66

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Solution

The fourth proportional to 30,831.78, 42,553.62 and 18,090.66 is: 24,968.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,831.78 : 42,553.62 = 18,090.66 : x
  2. Step 2: Convert to fraction form
    30,831.78/42,553.62 = 18,090.66/x
  3. Step 3: Cross multiply
    30,831.78x = 42,553.62 × 18,090.66
  4. Step 4: Simplify right side
    30,831.78x = 769,823,071.19
  5. Step 5: Solve for x
    x = 769,823,071.19/30,831.78
  6. Step 6: Final answer
    x = 24,968.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.